fix: vite server hotfix

frontend/Dockerfile

@@ -1,4 +1,5 @@
-FROM node:20-alpine
+# Stage 1: build
+FROM node:20-alpine AS builder
 
 WORKDIR /app
 
@@ -6,5 +7,12 @@ COPY package.json package-lock.json ./
 RUN npm ci
 
 COPY . .
+RUN npm run build
 
-CMD ["npm", "run", "dev"]
+# Stage 2: serve with nginx
+FROM nginx:alpine
+
+COPY --from=builder /app/dist /usr/share/nginx/html
+COPY nginx.prod.conf /etc/nginx/conf.d/default.conf
+
+EXPOSE 80